PI74FCT521 View Datasheet(PDF) - Pericom Semiconductor
Part Name
Description
MFG CO.
'PI74FCT521' PDF : 4 Pages View PDF
PI74FCT521T
1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567889-0B12I12T34I56D78E90N12T34I56T78Y901C23O45M678P90A12R123A45T67O89R012
Product Pin Description
Pin Name
IA=B
OA=B
A0–A7
B0–B7
GND
VCC
Description
Expansion or Enable Input (Active LOW)
Identity Output (Active LOW)
Word A Inputs
Word B Inputs
Ground
Power
Product Pin Configuration
IA=B
A0
B0
A1
B1
A2
B2
A3
B3
GND
1
20
2
19
3 20-PIN 18
4 L20 17
5 P20 16
6 Q20 15
7 R20 14
8 S20 13
9
12
10
11
Vcc
OA=B
B7
A7
B6
A6
B5
A5
B4
A4
Truth Table(1)
IA=B
L
L
H
H
Inputs
A, B
A = B*
A≠B
A = B*
A≠B
Output
OA=B
L
H
H
H
NOTE: 1. H = High Voltage Level
L = Low Voltage Level,
*A0 = B0, A1 = B1, A2 = B2, etc.
2
PS2019A 03/11/96
Share Link: 
